title: Influenza A virus subtype H5N1 infection in humans: update.
mesh_terms: D000818:Animals; D001717:Birds; D002645:Chickens; D004196:Disease Outbreaks; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D009975:Orthomyxoviridae